Floor-scraping machine



Feb. 8 1927.

. A n v1,616,895

R. GRABowsKl v moon scnAPING MACHINE n Filed June 27, 1925 g sheets-sheet 1 (gn/vanto@ F l g K eb' 8 1927 R. GRABowsKl FLOOR SCRAPING MACHINE 2 Sheets-Sheet 2 Filed June 27, 1925 Patented Feb. 8, i927..

ROMUALD GRABOWSKI, 0F TBENTON, JERSEY.

FLOOR-SCRAPING MACHINE.

Application filed June 27, 1925. Serial No. 40,009.

This invention relates to certain improvements in floor scraping machines general character of a rotary type, and it is an object of the invention to provide aldevice of this kind with mea-ns whereby the extent of penetration of the scraping` blades is posi-` tively limited and thereby assuring a constant scraping action.

It is also an object of the invention to provide a device of this general character'comprising a rotary element together with means for effectively maintaining the 'scrapingv blades in applied position thereon with the scraping edge of each of the blades in proper relation with respect to the axis of the rotary element.

Another object of the invention is to pro,-

vide a device of this general character comprising` ay rotary scraping element together with driving means for said element and wherein idler members are provided for positively limiting the extent of pene-tration of the scraping element.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved floor scraping machine whereby certain important advantages are attained and y the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.l

The novel features of' my-invention will hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying drawings, wherein Figure 1 is a view in side elevation illustrating a floor scraping machine constructed in accordance with an'embodiment of my invention; I

Figure 2 is a fragmentary view partly in vertical section and partly in elevation of the device as herein disclosed;

I Figure 3 is asectional view taken substantially on the line 3-3 of Figure 2;

Figure 4 is a detailed sectional substantially Von the line 4-4 of Figure 3;

Figure 5 is a fragmentary view in perspective of one of the blade mounting flanges;

Figure 6 is aview in perspective of the working, end portion of a scraping blade.

As disclosed in the accompanying drawings, B denotes a body member substantially y andY hasl relation more particularly to a device of this view taken Y for theshaft 8.

in the form of an vinverted U and'of desired dimensions and which has operatively engaged with its rear portion a steering wheel S and a push handle H. As the particular attachment ofthe Vwheel `S and-the push handle H with 'the body B forms no particular part of my invention it is: Anot believed that a detailed description andillus- Vtration' there-of is necessary.

The side members 1 of the body B each have securedtol the outer face thereof the vertically disposed guide members 2 between which is operatively engaged a slide .3 the lower end portion of which carrying a ground' engaging wheel l. The upward .movement of each of the slides 3, as herein disclosed, is limited by au eccentric 5 carried by the adjacent side member 1 of the body B, said eccentric 5 being adapted tobe operatedv by the operating handle or lever 6 carried thereby. Upon lowering the high point of each ofthe eccentrics 5 the slides 3 may be forced downwardly a vdesired extent to cause the wheels l to have proper engagement with the floor orother surface to maintain the body By in desired raised position and particularly to maintain the scraping blades `A out of contact with such surface which is particularly desirable when transporting the machine or when the machine is not in actual operation. yBy disposing the low point of' each of the eccentrics 5 downwardlytheslide 3 will be permitted to move upwardly so that such blades will have requisite contact 'with the work.

Theforward portions of the sidev members 1 ofthe body B, as hereindiscl-osed, are provided with the open slots 7 in which is 4adapted to be applied the 'opposite end portions of the shaft 8 or more particularly the flanged collars 9 freely mounted on said end lportions of the shaft. Bef-ore the shaft 8 is applied, the looirings 10 together with the anti-friction mediums 11 areproperly applied upon the shaft 8 and after the boxings 1() have been brought into proper position with respect to the side members 1 of the body B the same' are anchored in such position by the bolts 12 or the like disposed through said side members 1 and in threaded engagement `with the walls of .the boXings 10 as is particularly villustrated in Figure 1.

Bv this means va fixed mounting is providedy NThreaded upon the shaft 8 outwardlyv of the collars/9 are the holding members 14; Y,

Whichserve to niaintanithe collars 9 in desiredaapplied position togetheraivith thelantifriction means 11. One end portion of the shaft 8 has securedA thereto a sprocket Wheel 15 in driven connection'through'the medium of the chain 16 with the motorM, said motor being preferably of an electrical type and mounted directly upon the body B fas .illustrated in Figures 1 and 2. of' the accompanying-drawings. This L motor hl J is adapted :to be connected'with ia -suitable soiiiceot elcctrieal'genergy infany 'desired manner :and `it isalsoito be noted thatitlieimotor M may be (operatively lconnected With the :shaft 8 in any preferred manner other than by the use Aoi. the-:chain 16.

Fixed to .the shaft y-8 wand substantially bridging the spacezhetween the boXings 10 iis va 'fdru-in 17 Iof 'preferred Vdiameter and 'which is lprovided=circuinterentially there` around Withzth'e outstandingriianges .155,A each fof said :lianges shaving Iits yblade 'contacting ,surface or face itaiigential fto the peripheral linefof the drum 17With each ofthe flanges i158 disposed :on ithesain'e angle With respect Ito 'the blade "contacting sur/races 'of ithe fad- .jacent fi'anges.

Y rElie blades iiare of a scrapingtypeand fe'achioi' saidf'hladesfis maintained in applied iposition bythe vholding screws 19 threaded Athroughan elongated strip .220l disposed lon- ;gitudinally r of a `flange .18 and f' overlying fan applied :blad-e A. The :extremities of .the @members Vor `.strips :'20 are returned, as iat' 21,

' -to iprovide hook :like ends straddling the `opposite faceof aria-nge 18 and havingfclose :contact therewith Whenthe-screws "19 are :atljiistedttoihold -ablade Ain appliediposition. .f'Each off the; returned portions ofl each "offtli'efliooklike endsrQl-'oit' the inein'bersiQO vvhas its inner "face provided with the teeth :22 `.which are :rece ived .iinr similarly formed ipoolrets for :recesses '.23 4provided `in ithe rear face of the flange 18 so that theiineniber 2O fis effectively held against movement out- -Wazrdly of-a iiange :118 vwhen a'blade A is :'cflainp'ed thereto. lVhendt is desired to re-V -nfiove 'the fap'pliedfblade ifiiit is only ynecesfsary to :adjust the 'screws l19outWardly v'a sucient distance.

The outer or etree corner .ot each o' the .flanges 18 has 'extending outwardly from -its blade 'contacting :surface the vlugs 24 'which rarexad'aptetltobereceived inthe cut out i portions 25 .provided in` the 'Working eX- itreinity of afblade Arai/ith the iinner shoulders a aiorded byx each fof the f ciit out por'- LticnsfZ in contact fWi'tli the inner end o o'i a. 11155124. Bythis ine-ans, the projection of fthe .Working or scrapingl edge@ of 'a scraping .blade '-A is limited. 'The `Working or ing .edge c fof Athe blade iinay becansed to -project` vi'urther by lengtheningthe cut ont .portions Qfalthoughfinpractice it is? deemed :more Aexpedient tto provide :a plurality of -inountings 26 ortlie idler Wlieelsl'. idler Wheels?" areofsiinil-ar diameter-and scrap-V v separate blades A having'cut ont portions 25' of varying lengths.

Yto-assure the Working or scraping edge ck of the'lilavde to be properly set or to be arranged ini-parallelism With the axis oit' the shaft 8 as said inner ends Z; ot' the'lugs 24 oi' `each lange 18 :are aligned 'on :a :plane parallel tothe -aXis-ot'sthe-sha'ft or ofthe Adrinn 17. Y

rihe boxings :10 vare so constructed .asrto fhave ythe portions thereof immediately Eadconstituting t? jacent .to the i side members ,i1 I

These during a scraping operationihavef direct-'con` `tact with the floorl orfotlier :surface Ito Vbe Woijlrcd and thereby f provide positive mean-s Vtor limiting the :extent of penetration of thescrapingzedges@ ofthe' blades A, it=being 1 understood that such extent of penetration will vbe 1 'determined 'by fthe distanceeach of vsaid scraping -edges yc projects beyond the peripheries ot' the idler Wheels 27.

The inner-faces offtliein'fheels Q'iare pro- 'vi ded with the annular recesses in which -ai'e:free1y received'the endlportions ofie'ach fof the `ineinbers ,2O f so that When l the screws .19 have heenloosened-to'reinovef-a blade A it will bezassaredfthat-said nie1`iil3err20-ivill not be displaced with `respect `totheaassociated lflange 11S.V Y Y Y It is tobeparticularly noted that-in practica-the shaft 8 andthe drum 17 mounted .thereon rotate in.` an l anti-clockwise (direction as indicated in Figure i1 [by the arroiv vai whereby it is assured thatfthebladesi-A Will have veilte/tive `scraping action 4onthe surface being'tieated and inra manner whereby splitting or the like is efiectivelyiavoided. `:lt-is valso to be understood v-thfat'the shaft eny 8 is to be rotated at .an IextremelyEhigh Y' Aspeed. andr preferably at a rate-'ofover three lthousand revolutions per minute-so Athat the action of the scraping blades A upon ...the Work will .be substantially continuous.

Supported'within thefbody in any desired finanner and extending 'downwardly over the forward portion of the applieddriiin L17 and suitably spaced from the marginsfofitlie lflanges/18de a plate 29serving as'a-deiiector leading-to the conduit BOcarried-.byfthe upper portion of the'body :Bysaid conduit'BO .discharging vto l one side. 'otithe machine yand providing@ means -Whereby the scrapings Will be yreadily carried off and :if desired vdelivered Within a suitable collecting ybag.

'Y This, however, forms no particularipart of the present invention. ltfisalso to fbe im derstood that the curvedrplate 29 is adapte-d to be removed when it i-sdesiredfto'talreoiit the vshaft V8 and the parts carried thereby or Vto `replace vthe saine.

iin

Y iai Operatively engaged with the handle or lever 6 is a rearwardly directed rod 32 which is also operatively engaged with the lower end portion of a vertically disposed lever` 33 hingedly connected, as at 35, with the push handle H. Interposed between the upper portion of the push handle H and the lever 33 is a spring 35 of a tension to normally maintain the wheels 4 in contact with a floor or other surface to hold the forward portion of the body B raised. `When-it isl desired to bring the blades A into working action, the upper portion of the lever 33 is forced inwardly by the operator and which action rotates the eccentric 5 to bring the low point thereof downward. It will be understood that as soon as pressure upon vthe upper portion of the lever 33 is released, the spring 35 will operate to bring the high point of the eccentric 5 down and thereby raising the `forward portion of the body B to bring the blades A into idle position.

It is also to be noted that the inner end of each ofthe mountings .26 is provided with an outstanding flange 2G to provide means to prevent the adjacent wheel 27 havingundue movement toward the adjacent end of the drum 17.

From Vthe foregoing description it is thought to be obvious that a floor scraping machine constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and operated, and it will also be obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my invention in practice eXcept as hereinafter claimed.

l. A floor scraping machine comprising, in combination, a portable body, a drum rotatably supported thereby, means for rotating the drum, outstanding flanges carried by the drum and spaced circumferentially therearound, a scraping blade Aoverlying a face of each of the flanges and having its scraping edge projecting therebeyond, an

elongated member overlying the applied i blade and having reverted ,end portionsloverlapping the opposite face of the flange, and av screw threaded through the member and having direct clamping contact wit-h theelongated member overlying the applied e blade and having reverted end portions overlapping the opposite face of the flange, and a screw threaded through the member and having direct clamping Contact with the blade, the reverted extremities of the meinber and the opposed face of the flange interlocking to hold said member against slippage with respect to the flange when the blade is in clamped position.

3. A wood scraping machine comprising a portable body, a rotatable scraping ,rA element carried thereby, vmeans for rotating said element, slides carried by the side walls of the body for movement in a vertical direction, a ground engaging'wheel carried by the lower end portion of'each of the slides, and means carried by the body and engageable with the upper portionof each of the slides to raise the adjacent portion of the body to render the scraping element inoperative. y

4c. A wood'scraping machine comprising a portable body, a rotatable scraping element carried thereby, lmeans for rotating said element, slides carried by the side walls of the body for movement in a vertical di' rection, a ground engaging wheel carried by the lower end portion of each of the slides, and an eccentric carried by each side of the body and constantly in contact with the upper end of each of the slides.

In testimony whereof I hereunto affix my signature.

ROMUALD GRABOWSKI. 

